Riveting-machine.



No. 719,242. I PATENTED JAN. 27, 1903.

G. B; MARTIN. RIVBTING MACHINE.

APPLICATION FILED D120. 21, 1901.

I0 MODEL.

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. G. E. MARTIN. RIVETING MACHINE.

APPLICATION FILED DEO. 21, 1901.

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GEORGE E. MARTlN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PEDRIOK AND AYER COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

RlVETiNG iVl/ACHINE.

SPECIFICATION forming part of Letters Patent No. 719,22, dated January 27, 1903.

Application filed December 21,1901. Serial No. 86,733. (No model.)

To aid whom it may concern: and which serves the purpose of a dash-pot Be it known that I, GEORGE E. MARTIN, a to cushion the piston on its upward stroke. citizen of the United States, residing at Phila- The riveting-plunger (represented at is delphia, in the county of Philadelphia and reciprocated by means of the rocking lever 13 55 5 State of Pennsylvania, have invented certain and fulcrum-link 11, the lever being coupled new and useful Improvements in Rivetingwith the extension-rod 6 of the piston-rod 5 Machines, of which the following is a specifiand journaled directly to the riveting-plunoation, reference being had therein to the acger 10, and the fulcrum-link 11 t0 the lever 13 companying drawings. and to the stationary part 12 on the frame, 60 to This invention relates to improvements in the movement of the link and extension 17 of portable riveting-machines; and it consists in the lever being similar to the operation of a novel relative arrangement of the operative toggle-levers. The lever 13 and its arm 17 parts, all as hereinafter set forth. are made integral, and a socket is provided In the accompanying drawings, forming a to form a bearing for the fulcrum-lever 11, 65 partof this speoiiication,Figure1isaside eleside plates being fastened to the lever and vation, partly in section, showing the relative covering the journal of the lever 11 to mainarrangement of the power-cylinder, transmittain it in line with the lever 13, as shown in tingmechanism,and connected riveting-plun- Figspl, 3, 4:, 6, and 7. ger; Fig. 2, a top or plan view of the same; The connection between the power-piston 7o 20 Fig. 3, a sectional elevation of all the operarod and the riveting-plunger is made directly tive parts in relative position of action upon with the rocking lever 13, which is journaled the rivet; Fig. 4, a top view of the power-lerespectively thereto at its opposite ends and ver detached; Figs. 5 and 6, diagrammatic practically upon a horizontal plane, the up Views of the operative parts detached, showward stroke of the power-piston moving the 75 ing the extreme positions of the same at the rocking lever and the fulcrum-link 11 into full stroke of the power-piston; Fig. 7, a simithe line of movementof the plunger and the lar view showing a relative position of the return stroke out of line therewith to effect parts when adjusted to a more limited stroke, the forward and return motion of the plunger, and Figs. 8, 9, and 10, diagrammatic views of which will be readily understood by an in- 80 the riveting devices with rivets of varying spection of the various figures in the drawsize and plates in relative position correings.

sponding with the variable travel of the riv- The parallel arrangement of the movement eting-plunger. of the power-piston and riveting-plunger in Similar numerals of referencein the several this invention when compared with machines 85 w figures denote corresponding parts. of this kind in which the power-cylinder is 1 is the power-cylinder, 2 its reciprocating arranged in a line transverse or at an angle piston, and 3 a valve device for regulating the to the vertical line of movement of the rivadmission and release of the pressure meeting-plunger is one of the important feadium. tures of my invention. 9:) The piston 2 is a trunk type, with its The friction caused by a different alinetrunk eandits pivoted redo connected therement of the movement of the parts that proto, the latter projecting at its opposite end duce and apply the power is rendered pracbelow the trunk and connected at an extent-ically nil by my invention,wherein it is consion part 6, that communicates motion to the fined to the rotating journals of the interme: 95 J operating-lever 13. diate mechanism. This intermediate mech- The piston 2 is constructed with a central anism is located in a chamber constructed hollow part 8, that projects from its face side within the frame, the fulcrum-link 11 swingand in which the rod 5 is journaled. At the ing clear and the rocking lever 13 relieved top of the cylinder a bonnet 9 is provided to by steel guides 14:, placed in the adjacent Inc accommodate the central projecting part of sides of the frame, as shown in Figs. 1, 2, the piston in its extreme upward movement and 3. The connection of the lever 13 with the extension 6 and piston-rod 5 moves in the opening 15 clear of the trunk 4 and the frame. The endbearings 16 of the lever 13 and fulcrum-link 11 are made of blocks of steeland secured, respectively, in recesses provided in the riveting-plunger 10 and the opposite adjustable plug 7, as shown in Figs. 1 and 2.

The plug '7 is adjusted vertically by means of its threaded exterior for the purpose of varying the travel or throw of the'rivetingplunger when operating upon rivets of various sizes and lengths and which also varies the stroke of the power-piston.

The end of the stroke of the riveting-plunger 10 is always determined-by setting the riveting-die upon the plate and bringing the link 11 to a vertical line by means of the adjustable plug 7. When the plug 7 is at its highest point of adjustment, the rivetingplunger 10 and power-piston 2 are given full stroke, and at lower points of its adjustment the stroke of both the plunger and piston is shortened.

The reduced stroke of the riveting-plunger and consequent reduced stroke of the power-piston effects a saving in the consumption of the pressure medium.

The variation in the travel of the rivetingplungeris shown in the diagrammatic views, Figs. 8, 9, and 10, in the relative distance apart of the riveting-die and rivet at the extreme vertical position of the riveting-plunger in each instance.

The connection of the rocking lever 13 with the fulcrum-link 11 is made to effect a progressive increase in the applied force upon the riveting-plunger 10, due to the movement of the lever 13 by the power-piston and the change in the position of the fulcrum of the link as it approaches the vertical position. (Shown relatively in Figs. 5 and 3 of the drawings.)

The operation of the machine will be readily understood from an inspection of the drawings, the plates to be riveted being placed, with the rivet inserted, resting upon the riveting-anvil 20, as shown in Figs. 8, 9, and 10. The operating-valve 3 is turned to the position shown in Fig. 3, admitting the working fluid, which acting upon the under side of the power-piston 2 forces it upward and moving the connected rocking lever 13 therewith, which in turn acts to move the fulcrum-link 11 toward a vertical position, together with the extension 17 of the lever 13, and thus forcing the plunger 10 upon the end of the rivet. During this forward or operating stroke of the power-piston 2 the pressure from the preceding return stroke of the piston passes out through the valve to the exhaustpassage 18 to the atmosphere. The valve 3 is operated by means of the vibrating arm 19 to admit and release the pressure from the respective sides of the power-piston at each stroke in the usual way.

The invention-is shown in connection with a portable machine, but may be adapted to a fixed or stationary one and operated by pneumatic or other power.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination in a riveting-machine of a power cylinder and piston; a reciprocating riveting-plunger, and adjustable mechanism connecting said piston and rivetingplunger, said mechanism comprising provision in virtue of which the stroke of the power-piston and riveting-plunger may be varied, as set forth.

2. The combination in a riveting-machine of a power cylinder and piston, and pistonrod, a reciprocating riveting-plunger and a rocking lever connecting with the piston-rod and riveting-plunger and also with an adjustable fulcrum-link, whereby the throw of the piston and riveting-plunger is made variable, as set forth.

3. The combination with the rocking lever 13, of the guides 14 arranged in the range of movement of said lever, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE E. MARTIN.

Vitnesses:

ROBERT A. RUTHERFORD, J. HARRY COOK. 

